Blood Surf

"Blood Surf, also known as "Krocodylus", was released in 2000.

A pair of entrepreneurs with more bravery than brains hit upon the idea of blood surfing: spreading chum in the water in order to attract sharks, then hopping on a surfboard and riding through the middle of the pack.

As they're filming their promotional documentary, the fun gets interrupted by a thirty-foot long salt water crocodile that begins snacking on everyone in the expedition.